Durability of Bricks Coated with Red mud Based Geopolymer Paste

International Conference on Advances in Materials and Manufacturing Applications 2016

Singh, Smita^1 ; Basavanagowda, S.N.^2 ; Aswath, M.U.^3 ; Ranganath, R.V.^4

Dept. of Civil Engineering, Amrita School OfEngineering-Bengaluru Campus, Amrita Vishwa Vidyapeetham, Amrita University, Bangalore, India^1

National Institute of Technology, Suratkal, India^2

Dept. of Civil Engineering, Bangalore Institute of Technology, Bangalore, India^3

BMSCE, Bangalore, India^4

关键词: Durability of concretes;    Geopolymer;    Red mud;    Shrinkage cracks;    Strength loss;    Surface degradation;    Weight loss;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/149/1/012070/pdf
DOI  :  10.1088/1757-899X/149/1/012070

来源: IOP

【 摘 要 】

The present study is undertaken to assess the durability of concrete blocks coated with red mud - fly ash based geopolymer paste. Concrete blocks of size 200 x 200 x 100mm were coated with geopolymer paste synthesized by varying the percentages of red mud and fly ash. Uncoated concrete blocks were also tested for the durability for comparison. In thermal resistance test, the blocks were subjected to 600°C for an hour whereas in acid resistance test, they were kept in 5% sulphuric acid solution for 4 weeks. The specimens were thereafter studied for surface degradation, strength loss and weight loss. Pastes with red mud percentage greater than 50% developed lot of shrinkage cracks. The blocks coated with 30% and 50% red mud paste showed better durability than the other blocks. The use of blocks coated with red mud - fly ash geopolymer paste improves the aesthetics, eliminates the use of plaster and improves the durability of the structure.